Age and growth of the Spanish chub mackerel Scomber colias off southern Spain: a comparison between samples from the NE Atlantic and the SW Mediterranean

This paper studies the age and growth patterns of the Spanish chub mackerel Scomber colias off southern Spain collected from two different areas, Atlantic coast and Western Mediterranean, from October 2003 to September 2004. The length-weight relationship was given by TW=0.0015 TL 3.5289 (r² = 0.99,...

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Autores principales:	Velasco,Eva Maria, Del Arbol,Juan, Baro,Jorge, Sobrino,Ignacio
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2011
Materias:	Scombridae otolith von Bertalanffy parameters Strait of Gibraltar
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572011000100004
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spelling	oai:scielo:S0718-195720110001000042011-06-09Age and growth of the Spanish chub mackerel Scomber colias off southern Spain: a comparison between samples from the NE Atlantic and the SW MediterraneanVelasco,Eva MariaDel Arbol,JuanBaro,JorgeSobrino,Ignacio Scombridae otolith von Bertalanffy parameters Strait of Gibraltar This paper studies the age and growth patterns of the Spanish chub mackerel Scomber colias off southern Spain collected from two different areas, Atlantic coast and Western Mediterranean, from October 2003 to September 2004. The length-weight relationship was given by TW=0.0015 TL 3.5289 (r² = 0.99, where TW= total weight in g, TL= total length in mm). Age was determined by interpreting and counting growth rings on the sagitta otoliths of 221 individuals caught by the commercial Andalusian fleet and during fisheries research surveys. Two rings, one opaque and one hyaline, were laid down each year on the otoliths. The opaque zone was formed during spring and summer and the hyaline one during autumn and winter. The otolith radius-length of the fish relationship was described by the equation: TL = 43.881 * OR1.245 (r² = 0.93, where OR= otolith radius). The parameters of the fitted von Bertalanffy growth curve were estimated for sex combined for the whole period (L∞ = 43 cm, K = 0.27 for the Gulf of Cadiz, and L∞ = 40 cm, K = 0.37 for the Alboran Sea, where L∞ is defined as the asymptotic mean length and K is the rate at which the curve approaches the asymptote). There were no differences in growth rate between the sampling areas, suggesting that the Strait of Gibraltar is not a geographical break for the life history of this species; on the contrary, thanks to the similar environmental conditions of the Alboran Sea and the Gulf of Cadiz, the Strait of Gibraltar is a communication way that allows an Atlantic-Mediterranean larval flow.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.46 n.1 20112011-04-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572011000100004en10.4067/S0718-19572011000100004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Scombridae otolith von Bertalanffy parameters Strait of Gibraltar
spellingShingle	Scombridae otolith von Bertalanffy parameters Strait of Gibraltar Velasco,Eva Maria Del Arbol,Juan Baro,Jorge Sobrino,Ignacio Age and growth of the Spanish chub mackerel Scomber colias off southern Spain: a comparison between samples from the NE Atlantic and the SW Mediterranean
description	This paper studies the age and growth patterns of the Spanish chub mackerel Scomber colias off southern Spain collected from two different areas, Atlantic coast and Western Mediterranean, from October 2003 to September 2004. The length-weight relationship was given by TW=0.0015 TL 3.5289 (r² = 0.99, where TW= total weight in g, TL= total length in mm). Age was determined by interpreting and counting growth rings on the sagitta otoliths of 221 individuals caught by the commercial Andalusian fleet and during fisheries research surveys. Two rings, one opaque and one hyaline, were laid down each year on the otoliths. The opaque zone was formed during spring and summer and the hyaline one during autumn and winter. The otolith radius-length of the fish relationship was described by the equation: TL = 43.881 * OR1.245 (r² = 0.93, where OR= otolith radius). The parameters of the fitted von Bertalanffy growth curve were estimated for sex combined for the whole period (L∞ = 43 cm, K = 0.27 for the Gulf of Cadiz, and L∞ = 40 cm, K = 0.37 for the Alboran Sea, where L∞ is defined as the asymptotic mean length and K is the rate at which the curve approaches the asymptote). There were no differences in growth rate between the sampling areas, suggesting that the Strait of Gibraltar is not a geographical break for the life history of this species; on the contrary, thanks to the similar environmental conditions of the Alboran Sea and the Gulf of Cadiz, the Strait of Gibraltar is a communication way that allows an Atlantic-Mediterranean larval flow.
author	Velasco,Eva Maria Del Arbol,Juan Baro,Jorge Sobrino,Ignacio
author_facet	Velasco,Eva Maria Del Arbol,Juan Baro,Jorge Sobrino,Ignacio
author_sort	Velasco,Eva Maria
title	Age and growth of the Spanish chub mackerel Scomber colias off southern Spain: a comparison between samples from the NE Atlantic and the SW Mediterranean
title_short	Age and growth of the Spanish chub mackerel Scomber colias off southern Spain: a comparison between samples from the NE Atlantic and the SW Mediterranean
title_full	Age and growth of the Spanish chub mackerel Scomber colias off southern Spain: a comparison between samples from the NE Atlantic and the SW Mediterranean
title_fullStr	Age and growth of the Spanish chub mackerel Scomber colias off southern Spain: a comparison between samples from the NE Atlantic and the SW Mediterranean
title_full_unstemmed	Age and growth of the Spanish chub mackerel Scomber colias off southern Spain: a comparison between samples from the NE Atlantic and the SW Mediterranean
title_sort	age and growth of the spanish chub mackerel scomber colias off southern spain: a comparison between samples from the ne atlantic and the sw mediterranean
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572011000100004
work_keys_str_mv	AT velascoevamaria ageandgrowthofthespanishchubmackerelscombercoliasoffsouthernspainacomparisonbetweensamplesfromtheneatlanticandtheswmediterranean AT delarboljuan ageandgrowthofthespanishchubmackerelscombercoliasoffsouthernspainacomparisonbetweensamplesfromtheneatlanticandtheswmediterranean AT barojorge ageandgrowthofthespanishchubmackerelscombercoliasoffsouthernspainacomparisonbetweensamplesfromtheneatlanticandtheswmediterranean AT sobrinoignacio ageandgrowthofthespanishchubmackerelscombercoliasoffsouthernspainacomparisonbetweensamplesfromtheneatlanticandtheswmediterranean
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Age and growth of the Spanish chub mackerel Scomber colias off southern Spain: a comparison between samples from the NE Atlantic and the SW Mediterranean

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